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# source_distiller.py -- Getting the source to build from a branch
# Copyright (C) 2008, 2009 Canonical Ltd.
#
# This file is part of bzr-builddeb.
#
# bzr-builddeb is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# bzr-builddeb is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with bzr-builddeb; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
from __future__ import absolute_import
import glob
import os
import shutil
import tempfile
from ... import errors as bzr_errors
from ...export import (
export,
)
from .util import (
extract_orig_tarballs,
get_parent_dir,
recursive_copy,
)
class SourceDistiller(object):
"""A source distiller extracts the source to build from a location.
It does whatever is needed to give you a source you can build at
a location of your choice.
"""
supports_use_existing = False
def __init__(self, tree, upstream_provider, top_level=False,
use_existing=False, is_working_tree=False):
"""Create a SourceDistiller to distill from the specified tree.
:param tree: The tree to use as the source.
:param upstream_provider: an UpstreamProvider to provide the upstream
tarball if needed.
:param top_level: if the tree is in the top level directory instead of inside debian/.
:param use_existing: whether the distiller should re-use an existing
target if the distiller supports it.
:param is_working_tree: if `tree` is a working tree.
"""
self.tree = tree
self.upstream_provider = upstream_provider
self.top_level = top_level
self.use_existing = use_existing
if not self.supports_use_existing:
assert not self.use_existing, "distiller doesn't support use_existing"
self.is_working_tree = is_working_tree
def distill(self, target):
"""Extract the source to a tree rooted at the given location.
The passed location cannot already exist. If it does then
FileExists will be raised.
:param target: a string containing the location at which to
place the tree containing the buildable source.
"""
if not self.supports_use_existing or not self.use_existing:
if os.path.exists(target):
raise bzr_errors.FileExists(target)
elif self.supports_use_existing and self.use_existing:
if not os.path.exists(target):
raise bzr_errors.NotADirectory(target)
self._distill(target)
def _distill(self, target):
"""Subclasses should override this to implement distill."""
raise NotImplementedError(self._distill)
def _prepare_working_tree(self):
for (dp, ie) in self.tree.iter_entries_by_dir():
ie._read_tree_state(dp, self.tree)
class NativeSourceDistiller(SourceDistiller):
"""A SourceDistiller for unpacking a native package from a branch."""
def _distill(self, target):
if self.is_working_tree:
self._prepare_working_tree()
export(self.tree, target, None, None)
class FullSourceDistiller(SourceDistiller):
"""A SourceDistiller for full-source branches, a.k.a. normal mode"""
def _distill(self, target):
parent_dir = get_parent_dir(target)
self.upstream_provider.provide(parent_dir)
if self.is_working_tree:
self._prepare_working_tree()
export(self.tree, target)
class MergeModeDistiller(SourceDistiller):
supports_use_existing = True
def _distill(self, target):
# Get the upstream tarball
parent_dir = get_parent_dir(target)
if parent_dir != '' and not os.path.exists(parent_dir):
os.makedirs(parent_dir)
if not self.use_existing:
tarballs = self.upstream_provider.provide(parent_dir)
# Extract it to the right place
tempdir = tempfile.mkdtemp(prefix='builddeb-merge-')
try:
extract_orig_tarballs(tarballs, tempdir)
files = glob.glob(tempdir+'/*')
# If everything is in a single dir then move everything up one
# level.
if os.path.isdir(target):
shutil.rmtree(target)
if len(files) == 1:
shutil.move(files[0], target)
else:
shutil.move(tempdir, target)
finally:
if os.path.exists(tempdir):
shutil.rmtree(tempdir)
# Now export the tree to provide the debian dir
basetempdir = tempfile.mkdtemp(prefix='builddeb-merge-debian-')
try:
tempdir = os.path.join(basetempdir,"export")
if self.top_level:
os.makedirs(tempdir)
export_dir = os.path.join(tempdir, 'debian')
else:
export_dir = tempdir
if self.is_working_tree:
self._prepare_working_tree()
export(self.tree, export_dir)
# Remove any upstream debian dir, or from previous export with
# use_existing
if os.path.exists(os.path.join(target, 'debian')):
shutil.rmtree(os.path.join(target, 'debian'))
recursive_copy(tempdir, target)
finally:
shutil.rmtree(basetempdir)
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